US10848190B2 - Receiving device and method performed therein for handling signaling in a wireless communication network - Google Patents
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- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
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Definitions
- Embodiments herein relate to a receiving device and method performed therein regarding wireless communication. Furthermore, a computer program and a computer readable storage medium are also provided herein. In particular, embodiments herein relate to handling signaling, e.g. managing signaling or performing signaling, in a wireless communication network.
- wireless devices also known as wireless communication devices, mobile stations, stations (STA) and/or user equipments (UE), communicate via a Radio Access Network (RAN) to one or more core networks (CN).
- the RAN covers a geographical area which is divided into areas or cell areas, with each area or cell area being served by a radio network node such as an access node e.g., a Wi-Fi access point or a radio base station (RBS), which in some networks may also be called, for example, a “NodeB” or “eNodeB”.
- the area or cell area is a geographical area where radio coverage is provided by the access node.
- the access node operates on radio frequencies to communicate over an air interface with the wireless devices within range of the access node.
- the access node communicates over a downlink (DL) to the wireless device and the wireless device communicates over an uplink (UL) to the access node.
- DL downlink
- UL uplink
- a Universal Mobile Telecommunications System is a third generation telecommunication network, which evolved from the second generation (2G) Global System for Mobile Communications (GSM).
- the UMTS terrestrial radio access network (UTRAN) is essentially a RAN using wideband code division multiple access (WCDMA) and/or High Speed Packet Access (HSPA) for communication with user equipments.
- WCDMA wideband code division multiple access
- HSPA High Speed Packet Access
- 3GPP Third Generation Partnership Project
- telecommunications suppliers propose and agree upon standards for third generation networks and UTRAN specifically, and investigate enhanced data rate and radio capacity.
- 3GPP Third Generation Partnership Project
- RNC radio network controller
- BSC base station controller
- the Evolved Packet System comprises the Evolved Universal Terrestrial Radio Access Network (E-UTRAN), also known as the Long Term Evolution (LTE) radio access network, and the Evolved Packet Core (EPC), also known as System Architecture Evolution (SAE) core network.
- E-UTRAN/LTE is a 3GPP radio access technology wherein the access nodes are directly connected to the EPC core network.
- SAE System Architecture Evolution
- blocking objects between a wireless device and a radio network node may degrade radio conditions rapidly.
- a distance to the blocking object is limited, the increase of the path loss can be very sharp when going from a line-of-sight situation to a situation being shadowed by an object, denoted as a blocking object.
- the blocking loss for a path is well captured by a diffraction model which also means that the transition from a non-blocked state to a blocked state becomes more rapid in higher frequency bands.
- Fifth Generation (5G) access is expected to be a Time Division Duplex (TDD) access at higher frequency bands utilizing beamforming with high gain beams to enhance a so called link budget i.e. accounting of all of the gains and losses from the transmitter, through the medium, to the receiver.
- TDD Time Division Duplex
- link budget i.e. accounting of all of the gains and losses from the transmitter, through the medium, to the receiver.
- 5G access targets a short packet delay and mission critical applications.
- a rapid reconfiguration may be required, e.g. by switching beams to illuminate a different, non-blocked, propagation path.
- FIG. 1 shows numerical simulation of the scattering of a plane wave, i.e. a radio wave, onto a conducting cylindrical object.
- the object consists of a metallic pole of infinite length with a diameter being three times a wavelength, ⁇ , of the incoming radio wave.
- the link adaptation selects a Modulation and coding Scheme (MCS) based on a measurement that is 5-10 ms old.
- MCS Modulation and coding Scheme
- HARQ Hybrid Automatic Repeat Request
- RLC Radio Link Control
- An RLC retransmission results in a significant increase of the packet delay, and such packet delays will make it more difficult to maintain service quality for mission critical applications.
- blocking objects can cause severe delay of transmissions from wireless devices and network nodes leading to a limited performance of the wireless communication network.
- An object of embodiments herein is to provide a mechanism that improves the performance of the wireless communication network by mitigating the effect of blocking objects.
- the object is achieved by providing a method performed by a receiving device for handling signalling in a wireless communication network.
- the receiving device measures a strength, or a complex amplitude, of one or more signals over a signal path to a transmitting device, which measured strength or complex amplitude forms a signal pattern over a time.
- the receiving device matches the signal pattern with a stored signal pattern.
- the receiving device determines, in case the signal pattern matches the stored signal pattern that an object will block the signal path between the receiving device and the transmitting device.
- the object is achieved by providing a receiving device for handling signalling in a wireless communication network.
- the receiving device is configured to measure a strength, or a complex amplitude, of one or more signals over a signal path to a transmitting device, which measured strength or complex amplitude forms a signal pattern over a time.
- the receiving device is configured to match the signal pattern with a stored signal pattern; and in case the signal pattern matches the stored signal pattern; to determine that an object will block the signal path between the receiving device and the transmitting device.
- a computer program comprising instructions, which, when executed on at least one processor, causes the at least one processor to carry out the methods herein, as performed by the receiving device.
- a computer-readable storage medium having stored thereon a computer program comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the methods herein, as performed by the receiving device.
- Pattern recognition is used herein to detect when a wireless device is approaching the shadowed region behind a blocking object or approaching an object that will block the signal path between the receiving device and the transmitting device. Prior to blocking of a signal path between the receiving device and the transmitting device, a ripple pattern over time in measured physical properties caused by a nearby blocking edge occurs. The ripple pattern may be identified.
- One method of predicting blocking objects i.e. a pre-blocking detection, is exemplified and illustrated herein using e.g. Fast Fourier Transform (FFT), or Discrete Fourier Transform, of path loss.
- FFT Fast Fourier Transform
- Discrete Fourier Transform of path loss.
- the occurrence of the blocking of a path may be detected prior to that a path loss increase occurs, which in turn enables initiation of signal processing, such as link adaptation, handover or beam allocation to act proactively.
- the signal pattern can be detected in uplink for mitigation of downlink degradation prior blocking.
- Embodiments herein maintain high link performance despite Line of Sight (LoS), or similar strong reflection, conditions rapidly, and potentially frequently, being cut off. Furthermore, shorter delay for wireless communication network features is enabled and it is possible to maintain short packet delay continuously. These advantages, one by one or in combination, result in an improved performance of the wireless communication network.
- LoS Line of Sight
- FIG. 1 shows a simulation of a scattering of a radio wave onto a conducting cylindrical object
- FIG. 2 is a schematic overview depicting a wireless communication network according to embodiments herein;
- FIG. 3 shows a diagram depicting measurements of signal strength as the wireless device is passing 1 m behind a metallic pole with a speed of 0.5 m/s;
- FIG. 4 is a schematic flowchart depicting a method performed by a receiving device according to embodiments herein;
- FIG. 5 shows diagrams depicting measurements of signal strength and FFT tap 3 for detecting block object according to embodiments herein;
- FIG. 6 shows diagrams depicting measurements of signal strength and FFT tap 3 for detecting block object according to embodiments herein;
- FIG. 7 shows a diagram depicting monitoring peak-to-average ratio of the FFT output for selection of FFT tap.
- FIG. 8 is a block diagram depicting a receiving device according to embodiments herein.
- FIG. 2 is a schematic overview depicting a wireless communication network 1 .
- the wireless communication network 1 comprises one or more RANs and one or more CNs.
- the wireless communication network 1 may use a number of different technologies, such as Wi-Fi, Long Term Evolution (LTE), LTE-Advanced, Fifth Generation (5G), Wideband Code Division Multiple Access (WCDMA), Global System for Mobile communications/enhanced Data rate for GSM Evolution (GSM/EDGE), Worldwide Interoperability for Microwave Access (WiMax), or Ultra Mobile Broadband (UMB), just to mention a few possible implementations.
- LTE Long Term Evolution
- 5G Fifth Generation
- WCDMA Wideband Code Division Multiple Access
- GSM/EDGE Global System for Mobile communications/enhanced Data rate for GSM Evolution
- WiMax Worldwide Interoperability for Microwave Access
- UMB Ultra Mobile Broadband
- wireless devices e.g. a wireless device 10 such as a mobile station, a non-access point (non-AP) STA, a STA, a user equipment and/or a wireless terminal, communicate via one or more Access Networks (AN), e.g. RAN, to one or more core networks (CN).
- AN e.g. RAN
- CN core networks
- wireless device is a non-limiting term which means any terminal, wireless communication terminal, user equipment, Machine Type Communication (MTC) device, Device to Device (D2D) terminal, or node e.g. smart phone, laptop, mobile phone, sensor, relay, mobile tablets or even a small base station capable of communicating using radio communication with a network node within an area served by the network node.
- MTC Machine Type Communication
- D2D Device to Device
- the wireless communication network 1 comprises a first network node 12 providing radio coverage over a geographical area, a first service area 11 or first cell, of a first radio access technology (RAT), such as LTE, WiMAX or similar.
- the first network node 12 may be a transmission and reception point e.g. a radio network node such as a Wireless Local Area Network (WLAN) access point or an Access Point Station (AP STA), an access node, an access controller, a base station, e.g.
- WLAN Wireless Local Area Network
- AP STA Access Point Station
- a radio base station such as a NodeB, an evolved Node B (eNB, eNode B), a base transceiver station, a radio remote unit, an Access Point Base Station, a base station router, a transmission arrangement of a radio base station, a stand-alone access point or any other network unit or node capable of communicating with a wireless device within the area served by the first network node 12 depending e.g. on the first radio access technology and terminology used.
- the first network node may be referred to as a serving network node wherein the first cell may be referred to as a serving cell, and the serving network node communicates with the wireless device 10 in form of DL transmissions to the wireless device 10 and UL transmissions from the wireless device 10 .
- a service area may be denoted as cell, beam, beam group or similar to define an area of radio coverage.
- the first and second RAT may be the same RAT.
- the wireless device 10 moves around in the wireless communication network 1 and continuously measures signals in the wireless communication network 1 .
- blocking objects may reduce the performance of the wireless communication network, e.g. due to delaying transmissions
- embodiments herein provide a manner of detecting a blocking object, illustrated as a building in FIG. 2 , early and thereby enable triggering of a signal process to deal with upcoming blocking objects.
- the wireless device 10 is an example of a receiving device and the radio network node 12 is an example of a transmitting device. However, in some embodiments the radio network node 12 is an example of a receiving device and the wireless device 10 is an example of a transmitting device.
- the wireless device 10 may perform pattern recognition to detect when the wireless device 10 is approaching a signal shadowing behind the blocking object.
- the wireless device 10 measures a strength, or a complex amplitude, of one or more signals over a signal path to the radio network node 12 .
- the signal path is thus between the receiving device and the transmitting device.
- the measured strength or complex amplitude forms a signal pattern over a time or time interval, also referred to as a ripple pattern or a signal pattern varying over time.
- the strength or complex amplitude indicates a path loss of the signal path.
- the ripple pattern, over time of e.g. a path loss in measured and physical properties caused by a nearby blocking edge is identified by comparing or matching the signal pattern with a stored signal pattern.
- the receiving device determines, when the signal pattern matches the stored signal pattern that an object will, is expected to block, or predicted to block the signal path between the receiving device and the transmitting device.
- FFT Fast Fourier Transformation
- the blocking object can be detected prior the path loss increase occurs, which in turn enables radio features such as link adaptation, handover or beam allocation, to act proactively.
- the pattern can be detected in uplink for mitigation of downlink degradation prior blocking.
- Embodiments herein maintain high link performance despite Line of Sight (LoS) conditions rapidly, and potentially frequently, being cut off.
- LoS Line of Sight
- FIG. 3 shows results in terms of received signal strength from measurements at 15 GHz carrier frequency when the wireless device 10 is passing approximately 1 m behind a metallic pole; the distance between the wireless device 10 and the pole corresponds to 50 times the carrier wavelengths.
- the time interval 25-27 s it is more or less exactly the oscillation pattern as suggested by scattering theory illustrated in FIG. 1 ; measurement data around time 26 s is almost a perfect match to the theoretical envelope of the 50 ⁇ -dashed line in FIG. 1 .
- this signal pattern occurring when approaching an area behind a blocking object, can be detected, and in turn, used to mitigate the radio quality drop before it impacts link performance.
- FIG. 4 is a schematic flowchart depicting a method performed by the receiving device, such as the wireless device 10 or the radio network node 12 , for handling signaling, e.g. managing signaling or performing signaling, in the wireless communication network 1 according to embodiments herein.
- the actions do not have to be taken in the order stated below, but may be taken in any suitable order. Actions performed in some embodiments are marked with dashed boxes.
- the receiving device measures the strength or the complex amplitude of one or more signals over the signal path to the transmitting device, such as the radio network node 12 .
- the measured strength or complex amplitude forms the signal pattern over the time.
- the wireless device 10 measures the path loss, from the measured strength or complex amplitude, of one or more signals over the signal path to the radio network node 12 .
- the measured path loss forms the signal pattern.
- the receiving device may e.g. measure a signal strength or quality over a time interval forming the signal pattern over a time interval. For example, measure Reference signal Received Power (RSRP), Signal to Noise Ratio (SNR), signal to interference plus noise ratio (SINR), Reference signal received quality (RSRQ), or similar.
- RSRP Reference signal Received Power
- SNR Signal to Noise Ratio
- SINR signal to interference plus noise ratio
- RSRQ Reference signal received quality
- the receiving device may select one or several spectral components, also called taps herein being an example of frequency components, by means of Discrete Fourier Transformation (DFT), FFT or any equivalent method, as a trigger based on monitoring peak-to-average ratio of a spectral component method output.
- DFT Discrete Fourier Transformation
- FFT Fast Fourier Transformation
- an FFT may be performed over signal strength samples in time inside a window sliding with time.
- the receiving device may select a suitable FFT tap as a trigger based on monitoring peak-to-average ratio of the FFT output.
- the receiving device matches the signal pattern with the stored signal pattern. This may be performed by e.g. FFT of received signals strength/path loss, as will be described below, or pattern matching of e.g. Fresnel integrals, whose simultaneous parametrization are illustrated by an Euler spiral, a.k.a. Cornu spiral.
- the receiving device may match the signal pattern with the stored signal pattern by identifying strong delay samples corresponding to carrier frequency blocking.
- the receiving device may e.g. use pattern recognition to identify a blocking edge.
- the receiving device may match the patterns by comparing the one or several spectral components, by e.g. means of DFT or FFT, of the one or more signals with a threshold and when exceeding the threshold, the signal pattern matches the stored signal pattern.
- the receiving device may match the patterns by comparing the FFT tap, e.g. FFT tap 3, of the one or more signals with a tap threshold and when exceeding the tap threshold the signal pattern matches the stored signal pattern. Matching or pattern recognition may thus be made by FFT or DFT of path loss identifying strong delay samples corresponding to carrier frequency blocking.
- the stored signal pattern may be relating to time variation of strength or complex amplitudes of signals in a vicinity of an object, potentially blocking signals towards the receiving device. This stored signal pattern may be configured from the radio network node, preconfigured or similarly.
- the receiving device determines that an object will block the signal path between the receiving device and the transmitting device. This is also referred to as block prediction, wherein the receiving device predicts that the object will affect the signal path and determines that the object will or is expected to block the transmitting device.
- the receiving device may trigger a signal process to avoid signal interruption by taking into account that the object will block the signal path, e.g. indicate that the blocking object is approaching.
- the signal process may comprise one or more of: apply an increased code rate, apply a higher transmit power, initiate a search for alternative cells, initiate a search for alternative transmission antennas, initiate a search for alternative transmit antenna array beamforming weights, and transmit an indication of the blocking object to the transmitting device.
- the receiving device may thus activate a mitigation process, being an example of the signal process, to eliminate or limit the service impact of path loss increase.
- Example of signal processes in e.g. the wireless device 10 may be: Power control, i.e. increased transmit power; Allocating Handover measurement resources, such as trigger sending of handover report or increased handover measurement frequency; and Beamforming adaptation, such as activating a backup/alternative beam to be used if the presently used beam becomes blocked; or the like.
- the activation could encompass initiating pilot transmissions in a secondary beam.
- Examples performed by the receiving device when being the radio network node may be: Scheduling, such as sending packets to wireless devices approaching blocking with higher priority; Adjusting Power control; Performing Beamforming adaptation, such as activating a backup/alternative beam to be used if the presently used beam becomes blocked; or the like.
- the activation could encompass initiating pilot transmissions in a secondary beam; and initiating usage of more Multiple Input Multiple Output (MIMO) transmission layers given that channel rank might increase if dominating LoS beam is blocked.
- MIMO Multiple Input Multiple Output
- the receiving device may trigger a signal process at the transmitting device by transmitting an indication to the transmitting device, hence, the receiving device may indicate that the object will block the signal path between the receiving device and the transmitting device by transmitting an explicit indication or just reporting the deviations from the compared stored signal pattern.
- the transmitting device may then perform a mitigation/signal process such as Increasing channel coding; Scheduling, such as sending packets to wireless devices approaching blocking with higher priority; Adjusting Power control; Performing Beamforming adaptation, such as activating a backup/alternative beam to be used if the presently used beam becomes blocked.
- the activation could encompass initiating pilot transmissions in a secondary beam; and initiating usage of more Multiple Input Multiple Output (MIMO) transmission layers given that channel rank might increase if dominating LoS beam is blocked.
- MIMO Multiple Input Multiple Output
- FIG. 5 illustrates an example where said FFT approach is applied on a measurement on 15 GHz when a truck is passing the wireless device 10 by blocking at typically 4-5 m with vehicle speed of ⁇ 25 km/h.
- the signal strength is sampled for each 5 ms and the FFT is applied on a sliding window of 10 samples/50 ms.
- sampling rates could be increased, hence improving indicated detection performance.
- FIG. 5 shows that blocking starts at 31.56 s and given that said indicator can be observed at time 31.27 s; this means that using an energy detection level equal to 3, tap 3, i.e. energy accumulated over the corresponding frequency bin, as triggering condition, suggested blocking mitigation can be triggered 290 ms prior the sharp drop of signal strength.
- FIG. 5 shows blocking prediction example of the tap 3 of the FFT output measured on a truck passing by at 15 GHz, blocking starts at 31.56 s and the indicator can be observed at time 31.27 s, i.e. 290 ms in advance.
- False detections are also observed, in this case observed in the end of the blocking as seen in FIG. 5 after 36 s; such false detections can easily be filtered out based on the increase of signal strength.
- FIG. 6 shows another such example with another truck passing by at 4-5 m with ⁇ 25 km/h.
- using tap 3 energy detection level equals to 3 as triggering condition will not indicate the blocking very early in this case.
- a slightly lower trigger threshold e.g. tap 3 energy detection level equals to 2
- emerging blocking will be detected at 22.30 s given the blocking occurring at 22.34 s, i.e. providing an indication ⁇ 40 ms prior the sharp drop.
- TTI Transmission Time Interval
- FIG. 6 shows a blocking prediction example 2
- FFT tap 3 measured on truck passing by at 15 GHz blocking starts at 22.34 s and the indicator can be observed at time 22.30 s, i.e. 40 ms in advance.
- Selection of which FFT tap to be used for blocking detection trigger will depend on a used carrier frequency, a path loss measurement sampling rate and a typical (relative) speed between detecting the wireless device 10 and the blocking object.
- FIG. 5 and FIG. 6 are for relatively slowly moving vehicle and the exemplifying selection of FFT tap 3, i.e. the 40 Hz frequency component, shows to be a good measure.
- FFT tap 3 i.e. the 40 Hz frequency component
- a working embodiment using a FFT method for blocking detection when the receiving device is the wireless device 10 may be performed as the following:
- Relative speeds that are to be involved in future blocking situations may not be known, and establishing a trigger mechanism on more than one FFT tap, i.e. frequency component, would thereby be desirable.
- a subset of the FFT taps say 3 to 6, most real-world relative speeds can be catered for; for even faster blocking objects/situations, a prediction algorithm will likely not improve overall performance as the “time saved with the prediction” will in practice be significantly shorter than inherited wireless device/network signalling delays.
- monitoring peak-to-average ratio of the FFT output can be used to identify what frequency range to be considered; as exemplified in FIG. 7 , a certain FFT peak-to-average threshold could be applied to indicate what FFT frequency taps to consider as blocking trigger indicators.
- frequencies in the range of 45-53 Hz contains information, and related to above described setup this would correspond to FFT taps 3.
- FIG. 7 shows FFT spectrum ‘peak to average’ to identify FFT frequency trigger components.
- FIG. 8 is a block diagram depicting a receiving device 100 , such as the wireless device 10 of the radio network node 12 , for handling signalling in the wireless communication network according to embodiments herein.
- the receiving device 100 may comprise processing unit 801 , e.g. one or more processors, being configured to perform the methods herein.
- processing unit 801 e.g. one or more processors, being configured to perform the methods herein.
- the receiving device 100 may comprise a measuring module 802 .
- the receiving device 100 , the processing unit 801 and/or the measuring module 802 is configured to measure the strength or complex amplitude of one or more signals over the signal path to the transmitting device.
- the measured strength or complex amplitude forms the signal pattern over the time.
- path loss may be measured using the signal strength or quality of one or more signals over the time interval forming the signal pattern over the time interval.
- the receiving device 100 may comprise a matching module 803 .
- the receiving device 100 , the processing unit 801 and/or the matching module 803 is configured to match the signal pattern with the stored signal pattern.
- the receiving device 100 , the processing unit 801 and/or the matching module 803 may be configured to match the signal pattern with the stored signal pattern by being configured to identify strong delay samples corresponding to carrier frequency blocking.
- the receiving device 100 , the processing unit 801 and/or the matching module 803 may be configured to match the signal pattern with the stored signal pattern by being configured to compare the one or several spectral components, by means of DFT, FFT, or any equivalent method, of the one or more signals with the threshold and when exceeding the threshold, the signal pattern matches or is considered to match the stored signal pattern.
- the receiving device 100 may comprise a determining module 804 .
- the receiving device 100 , the processing unit 801 and/or the determining module 804 is configured to, in case the signal pattern matches the stored signal pattern; determine that an object will block the signal path between the receiving device and the transmitting device.
- the receiving device 100 may comprise a triggering module 805 .
- the receiving device 100 , the processing unit 801 and/or the triggering module 805 is configured to, in case determined that the object will block the signal path between the receiving device and the transmitting device, e.g. a blocking object is approaching, trigger the signal process to avoid signal interruption by taking into account that the object will block the signal path.
- the signal process may comprise one or more of: apply an increased code rate, apply a higher transmit power, initiate a search for alternative cells, initiate a search for alternative transmission antennas, and transmit an indication that the object will block the signal path to the transmitting device.
- the receiving device 100 may comprise a selecting module 806 .
- the receiving device 100 , the processing unit 801 and/or the selecting module 806 may be configured to select the one or more spectral components as the trigger based on monitoring peak-to-average ratio of the spectral component method output.
- an FFT tap is selected as a trigger based on monitored peak-to-average ratio of an FFT output.
- the receiving device 100 further comprises a memory 807 .
- the memory comprises one or more units to be used to store data on, such as FFT taps, signal strengths, thresholds, signal patterns, time intervals, applications to perform the methods disclosed herein when being executed, and similar.
- the methods according to the embodiments described herein for receiving device 100 are respectively implemented by means of e.g. a computer program 808 or a computer program product, comprising instructions, i.e., software code portions, which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the receiving device 100 .
- the computer program 808 may be stored on a computer-readable storage medium 809 , e.g. a disc or similar.
- the computer-readable storage medium 809 having stored thereon the computer program, may comprise the instructions which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the receiving device 100 .
- the computer-readable storage medium may be a non-transitory computer-readable storage medium.
- radio network node can correspond to any type of radio network node or any network node, which communicates with a UE and/or with another network node.
- network nodes are NodeB, MeNB, SeNB, a network node belonging to MCG or SCG, base station (BS), multi-standard radio (MSR) radio node such as MSR BS, eNodeB, network controller, radio network controller (RNC), base station controller (BSC), relay, donor node controlling relay, base transceiver station (BTS), access point (AP), transmission points, transmission nodes, Radio remote Unit (RRU), Remote Radio Head (RRH), nodes in distributed antenna system (DAS), core network node (e.g.
- MSC Mobile Switching Centre
- MME Mobility Management Entity
- O&M Operation and Maintenance
- OSS Operation Support system
- SON Self-Organizing Network
- positioning node e.g. Evolved Serving Mobile Location Centre (E-SMLC)
- E-SMLC Evolved Serving Mobile Location Centre
- MDT Minimizing Drive Test
- wireless device or user equipment refers to any type of wireless device communicating with a network node and/or with another UE in a cellular or mobile communication system.
- UE refers to any type of wireless device communicating with a network node and/or with another UE in a cellular or mobile communication system.
- Examples of UE are target device, device to device (D2D) UE, proximity capable UE (aka ProSe UE), machine type UE or UE capable of machine to machine (M2M) communication, PDA, PAD, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles etc.
- D2D device to device
- ProSe UE proximity capable UE
- M2M machine type UE or UE capable of machine to machine
- PDA personal area network
- PAD tablet
- mobile terminals smart phone
- LEE laptop embedded equipped
- LME laptop mounted equipment
- CA carrier aggregation
- PCell primary cell
- PSC primary serving cell
- SCell secondary serving cell
- LTE Long Term Evolution
- the embodiments are described for LTE. However the embodiments are applicable to any RAT or multi-RAT systems, where the UE receives and/or transmit signals (e.g. data) e.g. LTE FDD/TDD, WCDMA/HSPA, GSM/GERAN, Wi Fi, WLAN, CDMA2000 etc.
- ASIC application-specific integrated circuit
- Several of the functions may be implemented on a processor shared with other functional components of a wireless device or network node, for example.
- processors or “controller” as used herein does not exclusively refer to hardware capable of executing software and may implicitly include, without limitation, digital signal processor (DSP) hardware, read-only memory (ROM) for storing software, random-access memory for storing software and/or program or application data, and non-volatile memory.
- DSP digital signal processor
- ROM read-only memory
- RAM random-access memory
- non-volatile memory non-volatile memory
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
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- Electromagnetism (AREA)
- Discrete Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
-
- The
wireless device 10 measures path loss - The
wireless device 10 further applies FFT on signal strength - The
wireless device 10 measures expected blocking pattern taps of the FFT output, such astap 3 for the 15 GHz case above, - If the level of the tap exceeds a specified threshold the
wireless device 10 triggers the signal process such as a mitigation process.
- The
Claims (13)
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PCT/SE2016/050978 WO2018070907A1 (en) | 2016-10-11 | 2016-10-11 | Receiving device and method performed therein for handling signaling in a wireless communication network |
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US20190260406A1 US20190260406A1 (en) | 2019-08-22 |
US10848190B2 true US10848190B2 (en) | 2020-11-24 |
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US (1) | US10848190B2 (en) |
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US11523399B2 (en) * | 2018-09-25 | 2022-12-06 | New York University | System, method and computer-accessible medium for predicting wireless signal degradation |
US10616005B1 (en) | 2018-11-28 | 2020-04-07 | Samsung Electronics Co., Ltd. | Robust noise power estimation |
JP2022024500A (en) * | 2020-07-28 | 2022-02-09 | 日本電気株式会社 | Wireless communication device, wireless wave control method, and wireless wave control program |
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Also Published As
Publication number | Publication date |
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EP3526902B1 (en) | 2022-01-12 |
US20190260406A1 (en) | 2019-08-22 |
WO2018070907A1 (en) | 2018-04-19 |
EP3526902A1 (en) | 2019-08-21 |
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